Announcer: Starting right now on a special edition of "This week." Crisis point. A passenger plane shot down. 298 innocent lives lost. In the heart of the middle east, Israel begins it ground assault in gaza. Civilians caught in the middle. Here at home, warnings of new terror threats. Uncertainty across the globe. What's next? Who can we trust? How will the U.S. Respond? This morning, breaking details, insight, and analysis from our team around the world. And secretary John Kerry. Plus, Israeli prime minister Benjamin netanyahu. From the global resources of ABC news, a special edition of "This week." Crisis point. Here now, chief anchor George stephanopoulos. Good morning. We're tracking breaking news overnight from gaza and Ukraine. We begin with new outrage over Malaysia flight 17. Relief workers being forced to hand over the bodies of victims to armed rebels. More blame on Russia for the downing of the aircraft. Terry Moran is there on the scene. Good morning, terry. Reporter: Good morning, George. There is confusion and chaos surrounding this scene. The evidence, much of it still unguarded in the fields. And the bodies now being recovered slowly. No one knows where they're going to go. Nevertheless, the U.S. And others are beginning to build a case. From U.S. Officials this morning, powerful new accusations that a surface-to-air missile from rebel-controlled territory brought down the plane. More evidence they say of a Russian connection to the shootdown. The statement from the U.S. Embassy in Ukraine. It asserts a missile launch was detected from eastern Ukraine at the time the plane vanished from radar. Russian-backed rebels bragged about taking down a plane on social media, then deleted their posts. And that Russia has been training rebels on air defense systems. They also point to video of a missile launcher crossing the border back into Russia 12 hours after the crash, with at least one of its missiles missing. Meanwhile, back at the crash site, bodies of nearly 200 mh-17 victims have been removed. Emergency workers forced to turn them over to rebels. Some put on refrigerated train cars. Their destination unknown. When we visited the the site earlier, people had just begun to collect the bodies. Not a single professional air crash investigator was present. Even though the crash site remains unsecured. And there are no professional air crash investigators on the scene. They've begun collecting the bodies and stacking them like cord wood in the trucks. And there were reports that drunk rebels intimidated international monitors. They were only given partial access. There is a lot of security. We're being watched very carefully. Reporter: Now, three days after the jet was shot out of the sky, still no one knows when the bereaved will be able to bring their loved ones home. We have not been able to gain any guarantees from the authorities in the Ukraine that there will be safe passage allowed for family members. Reporter: And so the anguish of the families is deepening. We're hearing their anger is rising, quite understandably. The bottom line here. No investigators will get on this site until there is a cease-fire. Neither the Ukrainian government nor the rebels in control here have agreed on that yet.

This transcript has been automatically generated and may not be 100% accurate.

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